python - 为什么我的移动功能在 pygame 中不起作用？

Question

IDK 为什么我的 player.move() 不工作这是我的主类:

import pygame
from player import *

pygame.init()

WIDTH, HEIGHT = 900, 600
WIN = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("MyGame!")

FPS = 60

player_x = 500
player_y = 500
PLAYER_WIDTH = 60
PLAYER_HEIGHT = 60
PLAYER_VEL = 5

WHITE = (255, 255, 255)
BLACK = (0, 0, 0)

keys_pressed = pygame.key.get_pressed()

player_rect = pygame.Rect(player_x, player_y, PLAYER_WIDTH, PLAYER_HEIGHT)
player = Player(player_rect, BLACK, WIN, keys_pressed, PLAYER_VEL)

def draw_window():
    WIN.fill(WHITE)
    pygame.display.update()

def main():
    run = True
    clock = pygame.time.Clock()

    while run:
        clock.tick(FPS)
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                run = False

        draw_window()
        player.move()
        player.draw_player()

        pygame.display.update()

    pygame.quit()

if __name__ == '__main__':
    main()

这是我的另一个名为 player.py 的类，移动功能不起作用:导入pygame

class Player(object):
    def __init__(self, player, color, surface, keys_pressed, vel):
        self.player = player
        self.color = color
        self.surface = surface
        self.keys_pressed = keys_pressed
        self.vel = vel

    def draw_player(self):
        pygame.draw.rect(self.surface, self.color, self.player)
        pygame.display.update()

    def move(self):
        if self.keys_pressed[pygame.K_a]:
            self.player.x -= self.vel

        if self.keys_pressed[pygame.K_d]:
            self.player.x += self.vel

我尝试将 player = Player(...) 放在 main 函数之前。但是无论我尝试过什么，它似乎都不起作用，这是我第一次在 stackoverflow 上发帖提问。这个问题在过去也发生过很多次，所以感谢你帮助我。

Answer 1

pygame.key.get_pressed()返回包含每个键状态的序列。如果按住某个键，则该键的状态为 1，否则为 0。当键的状态改变时，keys_pressed 列表的内容不会神奇地改变。 keys_pressed 与按键无关。您需要在每一帧中获取键的新状态:

class Player(object):
    # [...]

    def move(self):

        # get current state of the keys
        self.keys_pressed = pygame.key.get_pressed()
        
        if self.keys_pressed[pygame.K_a]:
            self.player.x -= self.vel

        if self.keys_pressed[pygame.K_d]:
            self.player.x += self.vel